Leaching of Korean uranium bearing graphitic ore with sulfuric acid solution

Journal Article · Fri Jan 01 04:00:00 EST 1982 · AIChE Symp. Ser.; (United States)

OSTI ID:5659516

Lee, K Y; Hahn, K Ju.J.; Im, S J; Kom, W S

Laboratory studies have been conducted to obtain optimum conditions for extracting uranium values from a graphitic ore. Experiments were carried out to extract uranium from the ore ground to minus 48 mesh with sulfuric acid as a leachant and with manganese dioxide as an oxidizing agent. The uranium extraction from the ore with sulfuric acid was found to be very sensitive to pH change throughout the leaching operation. The major dissolution of the uranium from the ore was obtained at an oxidation potential of 450 mV(versus SCE) within the narrow pH range (2.0 + or - 0.2). Experimental results indicate that the uranium(IV) in the ore is oxidized to soluble U(VI) by hydrolytic ferric ions formed within the given pH range.

• Research Organization: Korea Institute of Energy and Resources Seoul
• OSTI ID: 5659516
• Journal Information: AIChE Symp. Ser.; (United States), Journal Name: AIChE Symp. Ser.; (United States) Vol. 78:216; ISSN ACSSC
• Country of Publication: United States
• Language: English

Related Subjects

050300* -- Nuclear Fuels-- Mining-- (-1987)
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
ACTINIDE COMPOUNDS
ACTINIDES
ASIA
BENCH-SCALE EXPERIMENTS
CARBON
CHALCOGENIDES
CHEMICAL REACTIONS
DEVELOPING COUNTRIES
DISPERSIONS
DISSOLUTION
ELEMENTAL MINERALS
ELEMENTS
GEOLOGIC DEPOSITS
GRAPHITE
HYDROGEN COMPOUNDS
INORGANIC ACIDS
LEACHING
MANGANESE COMPOUNDS
MANGANESE OXIDES
MATERIALS
METALS
MINERAL RESOURCES
MINERALS
MIXTURES
NONMETALS
OPTIMIZATION
ORE PROCESSING
ORES
OXIDATION
OXIDES
OXIDIZERS
OXYGEN COMPOUNDS
PH VALUE
PROCESSING
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
REPUBLIC OF KOREA
RESOURCES
SEPARATION PROCESSES
SOLUTIONS
SULFURIC ACID
TRANSITION ELEMENT COMPOUNDS
URANIUM
URANIUM COMPOUNDS
URANIUM DEPOSITS
URANIUM MINERALS
URANIUM ORES